Shielded metal arc welding (SMAW)
Today I will be discussing on what is shielded metal arc welding (SMAW), and how it works. Previously, I examined on Metal inert gas welding MIG. Check out!
What is shielded metal arc welding (SMAW)
Shielded metal arc welding is another type of arc welding process which is also known as stick welding, or manual arc welding. it uses a metallic consumable electrode of a proper composition for generating arc to the workpiece. This arc welding process is known as the simplest, less expensive, and most used type of arc welding process.
SMAW process works with electrodes coated with a shielding flux, this flux melts together with the electrode metallic core, which forms a gas and slag. This gas and slag shield the arc and the weld pool, and the flux cleans the metal surface. This flux supplies some alloying elements to the weld, stabilize the arc, and protect the molten metal from oxidation. In other word, the main function of the shielding is to protect the arc and the hot metal from chemical reaction with constituents of the atmosphere. SMAW process does not need filler metals as the electrode is already coated with fluxing agents, scavengers, and slag formers. The filler is obtained from the electrode.
How SMAW works
SMAW is carried out closely just as other arc welding process. It also uses AC or DC power supply which transfer current to the electrode holder in order to produce arc leading to intense heat to melt the tip of the electrode and the joining portion of the workpiece with the arc. This arc length is maintained by the welder by holding a consistent space between the electrode and the weld pool that is form on the workpiece. This workpiece bond as soon as the arc is taken off it. then the joint is obtained.
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